A water tank starts with 35 gallons and fills at 4.5 gallons per minute. Write a function for the amount of water after m minutes and find the amount after 12 minutes.
Reasoning strategy
Use initial value plus rate times time.
Difficulty Practice Guide
Easy Grade 8 Linear Functions Word Problems
This page shows what easy practice should demand for grade 8 linear functions word problems. The goal is not a larger worksheet. The goal is to make the student's reasoning visible enough to choose the next better problem.
What Changes At This Difficulty
Build confidence with the core story structure before adding extra traps.
Expected structure: 2-4 step problem solving.
Vocabulary load: high with minimal distractors.
Reasoning depth: at least 2 relationship layers.
Student Work Signals
A good easy problem should expose the bottleneck
MathRoutine watches for whether the student understood the situation, wrote a useful setup, handled the calculation, and answered the exact question asked.
1
identify the unknown quantity
2
choose the first operation or equation
3
check the answer against the question sentence
Sample Problems
Two tutoring plans charge $30 plus $18 per session and $54 plus $12 per session. For how many sessions do the plans cost the same?
Reasoning strategy
Set the two linear cost functions equal and solve.
Why This Matters
The paid value is diagnosis, not answer lookup
Basic gives repeated targeted practice. Pro becomes useful when the student needs help understanding wording, recovering the setup, or seeing the same misconception return across attempts.
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